 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.internal.editors.text;

 import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;

 import org.eclipse.jface.preference.IPreferenceStore;

 import org.eclipse.ui.editors.text.TextEditorPreferenceConstants;
 import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;


 /**
  * Preference initializer for Editors UI plug-in.
  *
  * @since 3.1
  */
 public class EditorsPluginPreferenceInitializer extends AbstractPreferenceInitializer {

     /*
      * @see org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer#initializeDefaultPreferences()
      * @since 3.1
      */
     public void initializeDefaultPreferences() {
         IPreferenceStore store= EditorsPlugin.getDefault().getPreferenceStore();
         TextEditorPreferenceConstants.initializeDefaultValues(store);
         migrateOverviewRulerPreference(store);
     }

     /**
      * Migrates the overview ruler preference by re-enabling it.
      *
      * @param store the preference store to migrate
      * @since 3.1
      */
     private void migrateOverviewRulerPreference(IPreferenceStore store) {
         String preference= AbstractDecoratedTextEditorPreferenceConstants.EDITOR_OVERVIEW_RULER;
         String postfix= "_migration"; //$NON-NLS-1$
 String MIGRATED= "migrated_3.1"; //$NON-NLS-1$
 String migrationKey= preference + postfix;

         String migrationValue= store.getString(migrationKey);
         if (!MIGRATED.equals(migrationValue)) {
             store.setValue(migrationKey, MIGRATED);
             if (!store.getBoolean(preference))
                 store.setValue(preference, true);
         }
     }
 }

